yes, your rooster should mount your silkie hen and yes if she goes broody the eggs should be fertile, I have breed silkies and also have sex links and isa browns, one of my silkie hens went broody have I hatched out some isa browns, and they have mini afros, feathers one their legs, purplish skin and the comb of a silke (not sure what its called)

I don't know if your chicks would turn out different with a stander roo, and silkie hen, but I hope this helps!!